Write-up: https://0x90r00t.com/2016/10/03/tumctf-2016-exploit-200-c0py_pr073c710n-write-up/
Just sources: https://github.com/0x90r00t/Write-Ups/tree/master/TumCTF/c0py_pr073c710n

Original writeup (https://0x90r00t.com/2016/10/03/tumctf-2016-exploit-200-c0py_pr073c710n-write-up/).